author | alanb |
Thu, 04 May 2017 07:26:28 +0000 | |
changeset 44993 | f61bcd80ec1f |
parent 42650 | 1f304d0c888b |
child 46458 | 3c12af929e7d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1998, 2016, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_VM_PRIMS_JVMTIEXPORT_HPP |
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#define SHARE_VM_PRIMS_JVMTIEXPORT_HPP |
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#include "jvmtifiles/jvmti.h" |
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#include "memory/allocation.hpp" |
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#include "memory/iterator.hpp" |
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#include "oops/oop.hpp" |
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#include "oops/oopsHierarchy.hpp" |
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#include "runtime/frame.hpp" |
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#include "runtime/handles.hpp" |
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#include "utilities/globalDefinitions.hpp" |
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#include "utilities/growableArray.hpp" |
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#include "utilities/macros.hpp" |
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// Must be included after jvmti.h. |
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#include "code/jvmticmlr.h" |
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// Forward declarations |
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class JvmtiEventControllerPrivate; |
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class JvmtiManageCapabilities; |
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class JvmtiEnv; |
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class JvmtiThreadState; |
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#define JVMTI_SUPPORT_FLAG(key) \ |
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private: \ |
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static bool _##key; \ |
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public: \ |
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inline static void set_##key(bool on) { \ |
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JVMTI_ONLY(_##key = (on != 0)); \ |
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NOT_JVMTI(report_unsupported(on)); \ |
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} \ |
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inline static bool key() { \ |
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JVMTI_ONLY(return _##key); \ |
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NOT_JVMTI(return false); \ |
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} |
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// This class contains the JVMTI interface for the rest of hotspot. |
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// |
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class JvmtiExport : public AllStatic { |
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friend class VMStructs; |
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friend class CompileReplay; |
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private: |
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#if INCLUDE_JVMTI |
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static int _field_access_count; |
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static int _field_modification_count; |
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static bool _can_access_local_variables; |
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static bool _can_hotswap_or_post_breakpoint; |
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static bool _can_modify_any_class; |
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static bool _can_walk_any_space; |
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#endif // INCLUDE_JVMTI |
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JVMTI_SUPPORT_FLAG(can_get_source_debug_extension) |
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JVMTI_SUPPORT_FLAG(can_maintain_original_method_order) |
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JVMTI_SUPPORT_FLAG(can_post_interpreter_events) |
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JVMTI_SUPPORT_FLAG(can_post_on_exceptions) |
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JVMTI_SUPPORT_FLAG(can_post_breakpoint) |
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JVMTI_SUPPORT_FLAG(can_post_field_access) |
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JVMTI_SUPPORT_FLAG(can_post_field_modification) |
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JVMTI_SUPPORT_FLAG(can_post_method_entry) |
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JVMTI_SUPPORT_FLAG(can_post_method_exit) |
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JVMTI_SUPPORT_FLAG(can_pop_frame) |
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JVMTI_SUPPORT_FLAG(can_force_early_return) |
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JVMTI_SUPPORT_FLAG(early_vmstart_recorded) |
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friend class JvmtiEventControllerPrivate; // should only modify these flags |
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JVMTI_SUPPORT_FLAG(should_post_single_step) |
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JVMTI_SUPPORT_FLAG(should_post_field_access) |
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JVMTI_SUPPORT_FLAG(should_post_field_modification) |
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JVMTI_SUPPORT_FLAG(should_post_class_load) |
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JVMTI_SUPPORT_FLAG(should_post_class_prepare) |
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JVMTI_SUPPORT_FLAG(should_post_class_unload) |
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JVMTI_SUPPORT_FLAG(should_post_native_method_bind) |
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JVMTI_SUPPORT_FLAG(should_post_compiled_method_load) |
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JVMTI_SUPPORT_FLAG(should_post_compiled_method_unload) |
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JVMTI_SUPPORT_FLAG(should_post_dynamic_code_generated) |
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JVMTI_SUPPORT_FLAG(should_post_monitor_contended_enter) |
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JVMTI_SUPPORT_FLAG(should_post_monitor_contended_entered) |
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JVMTI_SUPPORT_FLAG(should_post_monitor_wait) |
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JVMTI_SUPPORT_FLAG(should_post_monitor_waited) |
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JVMTI_SUPPORT_FLAG(should_post_data_dump) |
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JVMTI_SUPPORT_FLAG(should_post_garbage_collection_start) |
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JVMTI_SUPPORT_FLAG(should_post_garbage_collection_finish) |
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JVMTI_SUPPORT_FLAG(should_post_on_exceptions) |
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// ------ the below maybe don't have to be (but are for now) |
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// fixed conditions here ------------ |
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// any events can be enabled |
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JVMTI_SUPPORT_FLAG(should_post_thread_life) |
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JVMTI_SUPPORT_FLAG(should_post_object_free) |
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JVMTI_SUPPORT_FLAG(should_post_resource_exhausted) |
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// we are holding objects on the heap - need to talk to GC - e.g. |
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// breakpoint info |
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JVMTI_SUPPORT_FLAG(should_clean_up_heap_objects) |
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JVMTI_SUPPORT_FLAG(should_post_vm_object_alloc) |
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// If flag cannot be implemented, give an error if on=true |
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static void report_unsupported(bool on); |
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// these should only be called by the friend class |
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friend class JvmtiManageCapabilities; |
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inline static void set_can_modify_any_class(bool on) { |
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JVMTI_ONLY(_can_modify_any_class = (on != 0);) |
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} |
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inline static void set_can_access_local_variables(bool on) { |
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JVMTI_ONLY(_can_access_local_variables = (on != 0);) |
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} |
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inline static void set_can_hotswap_or_post_breakpoint(bool on) { |
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JVMTI_ONLY(_can_hotswap_or_post_breakpoint = (on != 0);) |
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} |
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inline static void set_can_walk_any_space(bool on) { |
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JVMTI_ONLY(_can_walk_any_space = (on != 0);) |
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} |
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enum { |
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JVMTI_VERSION_MASK = 0x70000000, |
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JVMTI_VERSION_VALUE = 0x30000000, |
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JVMDI_VERSION_VALUE = 0x20000000 |
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}; |
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static void post_field_modification(JavaThread *thread, Method* method, address location, |
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KlassHandle field_klass, Handle object, jfieldID field, |
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char sig_type, jvalue *value); |
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// posts a DynamicCodeGenerated event (internal/private implementation). |
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// The public post_dynamic_code_generated* functions make use of the |
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// internal implementation. Also called from JvmtiDeferredEvent::post() |
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static void post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) NOT_JVMTI_RETURN; |
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private: |
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// GenerateEvents support to allow posting of CompiledMethodLoad and |
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// DynamicCodeGenerated events for a given environment. |
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friend class JvmtiCodeBlobEvents; |
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static void post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length, |
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const void *code_begin, const jint map_length, |
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const jvmtiAddrLocationMap* map) NOT_JVMTI_RETURN; |
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static void post_dynamic_code_generated(JvmtiEnv* env, const char *name, const void *code_begin, |
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const void *code_end) NOT_JVMTI_RETURN; |
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// The RedefineClasses() API breaks some invariants in the "regular" |
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// system. For example, there are sanity checks when GC'ing nmethods |
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// that require the containing class to be unloading. However, when a |
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// method is redefined, the old method and nmethod can become GC'able |
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// without the containing class unloading. The state of becoming |
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// GC'able can be asynchronous to the RedefineClasses() call since |
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// the old method may still be running and cannot be GC'ed until |
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// after all old invocations have finished. Additionally, a method |
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// that has not been redefined may have an nmethod that depends on |
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// the redefined method. The dependent nmethod will get deopted in |
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// this case and may also be GC'able without the containing class |
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// being unloaded. |
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// |
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// This flag indicates whether RedefineClasses() has ever redefined |
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// one or more classes during the lifetime of the VM. The flag should |
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// only be set by the friend class and can be queried by other sub |
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// systems as needed to relax invariant checks. |
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static bool _has_redefined_a_class; |
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friend class VM_RedefineClasses; |
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inline static void set_has_redefined_a_class() { |
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JVMTI_ONLY(_has_redefined_a_class = true;) |
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} |
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// Flag to indicate if the compiler has recorded all dependencies. When the |
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// can_redefine_classes capability is enabled in the OnLoad phase then the compiler |
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// records all dependencies from startup. However if the capability is first |
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// enabled some time later then the dependencies recorded by the compiler |
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// are incomplete. This flag is used by RedefineClasses to know if the |
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// dependency information is complete or not. |
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static bool _all_dependencies_are_recorded; |
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public: |
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inline static bool has_redefined_a_class() { |
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JVMTI_ONLY(return _has_redefined_a_class); |
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NOT_JVMTI(return false); |
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} |
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inline static bool all_dependencies_are_recorded() { |
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return _all_dependencies_are_recorded; |
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} |
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inline static void set_all_dependencies_are_recorded(bool on) { |
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_all_dependencies_are_recorded = (on != 0); |
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} |
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// Add read edges to the unnamed modules of the bootstrap and app class loaders |
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static void add_default_read_edges(Handle h_module, TRAPS) NOT_JVMTI_RETURN; |
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// Add a read edge to the module |
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static jvmtiError add_module_reads(Handle module, Handle to_module, TRAPS); |
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// Updates a module to export a package |
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static jvmtiError add_module_exports(Handle module, Handle pkg_name, Handle to_module, TRAPS); |
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// Updates a module to open a package |
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static jvmtiError add_module_opens(Handle module, Handle pkg_name, Handle to_module, TRAPS); |
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// Add a used service to the module |
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static jvmtiError add_module_uses(Handle module, Handle service, TRAPS); |
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// Add a service provider to the module |
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static jvmtiError add_module_provides(Handle module, Handle service, Handle impl_class, TRAPS); |
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// let JVMTI know that the JVM_OnLoad code is running |
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static void enter_onload_phase() NOT_JVMTI_RETURN; |
1 | 237 |
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// let JVMTI know that the VM isn't up yet (and JVM_OnLoad code isn't running) |
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static void enter_primordial_phase() NOT_JVMTI_RETURN; |
1 | 240 |
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// let JVMTI know that the VM isn't up yet but JNI is live |
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static void enter_early_start_phase() NOT_JVMTI_RETURN; |
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static void enter_start_phase() NOT_JVMTI_RETURN; |
1 | 244 |
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// let JVMTI know that the VM is fully up and running now |
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static void enter_live_phase() NOT_JVMTI_RETURN; |
1 | 247 |
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// ------ can_* conditions (below) are set at OnLoad and never changed ------------ |
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inline static bool can_modify_any_class() { |
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JVMTI_ONLY(return _can_modify_any_class); |
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NOT_JVMTI(return false); |
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} |
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inline static bool can_access_local_variables() { |
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JVMTI_ONLY(return _can_access_local_variables); |
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NOT_JVMTI(return false); |
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} |
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inline static bool can_hotswap_or_post_breakpoint() { |
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JVMTI_ONLY(return _can_hotswap_or_post_breakpoint); |
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NOT_JVMTI(return false); |
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} |
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inline static bool can_walk_any_space() { |
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JVMTI_ONLY(return _can_walk_any_space); |
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NOT_JVMTI(return false); |
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} |
1 | 265 |
|
266 |
// field access management |
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static address get_field_access_count_addr() NOT_JVMTI_RETURN_(0); |
1 | 268 |
|
269 |
// field modification management |
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static address get_field_modification_count_addr() NOT_JVMTI_RETURN_(0); |
1 | 271 |
|
272 |
// ----------------- |
|
273 |
||
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static bool is_jvmti_version(jint version) { |
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JVMTI_ONLY(return (version & JVMTI_VERSION_MASK) == JVMTI_VERSION_VALUE); |
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NOT_JVMTI(return false); |
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} |
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static bool is_jvmdi_version(jint version) { |
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JVMTI_ONLY(return (version & JVMTI_VERSION_MASK) == JVMDI_VERSION_VALUE); |
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NOT_JVMTI(return false); |
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281 |
} |
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static jint get_jvmti_interface(JavaVM *jvm, void **penv, jint version) NOT_JVMTI_RETURN_(0); |
4491 | 283 |
static void decode_version_values(jint version, int * major, int * minor, |
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int * micro) NOT_JVMTI_RETURN; |
1 | 285 |
|
286 |
// single stepping management methods |
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static void at_single_stepping_point(JavaThread *thread, Method* method, address location) NOT_JVMTI_RETURN; |
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static void expose_single_stepping(JavaThread *thread) NOT_JVMTI_RETURN; |
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static bool hide_single_stepping(JavaThread *thread) NOT_JVMTI_RETURN_(false); |
1 | 290 |
|
291 |
// Methods that notify the debugger that something interesting has happened in the VM. |
|
36508 | 292 |
static void post_early_vm_start () NOT_JVMTI_RETURN; |
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static void post_vm_start () NOT_JVMTI_RETURN; |
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static void post_vm_initialized () NOT_JVMTI_RETURN; |
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static void post_vm_death () NOT_JVMTI_RETURN; |
1 | 296 |
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static void post_single_step (JavaThread *thread, Method* method, address location) NOT_JVMTI_RETURN; |
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static void post_raw_breakpoint (JavaThread *thread, Method* method, address location) NOT_JVMTI_RETURN; |
1 | 299 |
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static void post_exception_throw (JavaThread *thread, Method* method, address location, oop exception) NOT_JVMTI_RETURN; |
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static void notice_unwind_due_to_exception (JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) NOT_JVMTI_RETURN; |
1 | 302 |
|
303 |
static oop jni_GetField_probe (JavaThread *thread, jobject jobj, |
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oop obj, Klass* klass, jfieldID fieldID, bool is_static) |
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NOT_JVMTI_RETURN_(NULL); |
1 | 306 |
static oop jni_GetField_probe_nh (JavaThread *thread, jobject jobj, |
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oop obj, Klass* klass, jfieldID fieldID, bool is_static) |
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NOT_JVMTI_RETURN_(NULL); |
1 | 309 |
static void post_field_access_by_jni (JavaThread *thread, oop obj, |
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Klass* klass, jfieldID fieldID, bool is_static) NOT_JVMTI_RETURN; |
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static void post_field_access (JavaThread *thread, Method* method, |
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address location, KlassHandle field_klass, Handle object, jfieldID field) NOT_JVMTI_RETURN; |
1 | 313 |
static oop jni_SetField_probe (JavaThread *thread, jobject jobj, |
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oop obj, Klass* klass, jfieldID fieldID, bool is_static, char sig_type, |
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jvalue *value) NOT_JVMTI_RETURN_(NULL); |
1 | 316 |
static oop jni_SetField_probe_nh (JavaThread *thread, jobject jobj, |
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oop obj, Klass* klass, jfieldID fieldID, bool is_static, char sig_type, |
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jvalue *value) NOT_JVMTI_RETURN_(NULL); |
1 | 319 |
static void post_field_modification_by_jni(JavaThread *thread, oop obj, |
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Klass* klass, jfieldID fieldID, bool is_static, char sig_type, |
1 | 321 |
jvalue *value); |
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static void post_raw_field_modification(JavaThread *thread, Method* method, |
1 | 323 |
address location, KlassHandle field_klass, Handle object, jfieldID field, |
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char sig_type, jvalue *value) NOT_JVMTI_RETURN; |
1 | 325 |
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static void post_method_entry (JavaThread *thread, Method* method, frame current_frame) NOT_JVMTI_RETURN; |
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static void post_method_exit (JavaThread *thread, Method* method, frame current_frame) NOT_JVMTI_RETURN; |
1 | 328 |
|
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static void post_class_load (JavaThread *thread, Klass* klass) NOT_JVMTI_RETURN; |
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static void post_class_unload (Klass* klass) NOT_JVMTI_RETURN; |
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331 |
static void post_class_prepare (JavaThread *thread, Klass* klass) NOT_JVMTI_RETURN; |
1 | 332 |
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333 |
static void post_thread_start (JavaThread *thread) NOT_JVMTI_RETURN; |
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static void post_thread_end (JavaThread *thread) NOT_JVMTI_RETURN; |
1 | 335 |
|
336 |
// Support for java.lang.instrument agent loading. |
|
337 |
static bool _should_post_class_file_load_hook; |
|
338 |
inline static void set_should_post_class_file_load_hook(bool on) { _should_post_class_file_load_hook = on; } |
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inline static bool should_post_class_file_load_hook() { |
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JVMTI_ONLY(return _should_post_class_file_load_hook); |
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NOT_JVMTI(return false;) |
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342 |
} |
42650 | 343 |
// Return true if the class was modified by the hook. |
344 |
static bool post_class_file_load_hook(Symbol* h_name, Handle class_loader, |
|
1 | 345 |
Handle h_protection_domain, |
346 |
unsigned char **data_ptr, unsigned char **end_ptr, |
|
42650 | 347 |
JvmtiCachedClassFileData **cache_ptr) NOT_JVMTI_RETURN_(false); |
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static void post_native_method_bind(Method* method, address* function_ptr) NOT_JVMTI_RETURN; |
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349 |
static void post_compiled_method_load(nmethod *nm) NOT_JVMTI_RETURN; |
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350 |
static void post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) NOT_JVMTI_RETURN; |
1 | 351 |
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// used to post a CompiledMethodUnload event |
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353 |
static void post_compiled_method_unload(jmethodID mid, const void *code_begin) NOT_JVMTI_RETURN; |
1 | 354 |
|
355 |
// similiar to post_dynamic_code_generated except that it can be used to |
|
356 |
// post a DynamicCodeGenerated event while holding locks in the VM. Any event |
|
357 |
// posted using this function is recorded by the enclosing event collector |
|
358 |
// -- JvmtiDynamicCodeEventCollector. |
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359 |
static void post_dynamic_code_generated_while_holding_locks(const char* name, address code_begin, address code_end) NOT_JVMTI_RETURN; |
1 | 360 |
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361 |
static void post_garbage_collection_finish() NOT_JVMTI_RETURN; |
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362 |
static void post_garbage_collection_start() NOT_JVMTI_RETURN; |
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363 |
static void post_data_dump() NOT_JVMTI_RETURN; |
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364 |
static void post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) NOT_JVMTI_RETURN; |
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365 |
static void post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) NOT_JVMTI_RETURN; |
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366 |
static void post_monitor_wait(JavaThread *thread, oop obj, jlong timeout) NOT_JVMTI_RETURN; |
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367 |
static void post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) NOT_JVMTI_RETURN; |
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368 |
static void post_object_free(JvmtiEnv* env, jlong tag) NOT_JVMTI_RETURN; |
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369 |
static void post_resource_exhausted(jint resource_exhausted_flags, const char* detail) NOT_JVMTI_RETURN; |
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370 |
static void record_vm_internal_object_allocation(oop object) NOT_JVMTI_RETURN; |
1 | 371 |
// Post objects collected by vm_object_alloc_event_collector. |
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372 |
static void post_vm_object_alloc(JavaThread *thread, oop object) NOT_JVMTI_RETURN; |
1 | 373 |
// Collects vm internal objects for later event posting. |
374 |
inline static void vm_object_alloc_event_collector(oop object) { |
|
375 |
if (should_post_vm_object_alloc()) { |
|
376 |
record_vm_internal_object_allocation(object); |
|
377 |
} |
|
378 |
} |
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inline static void post_array_size_exhausted() { |
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380 |
if (should_post_resource_exhausted()) { |
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381 |
post_resource_exhausted(JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
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382 |
"Requested array size exceeds VM limit"); |
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383 |
} |
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384 |
} |
1 | 385 |
|
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386 |
static void cleanup_thread (JavaThread* thread) NOT_JVMTI_RETURN; |
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static void clear_detected_exception (JavaThread* thread) NOT_JVMTI_RETURN; |
1 | 388 |
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389 |
static void oops_do(OopClosure* f) NOT_JVMTI_RETURN; |
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static void weak_oops_do(BoolObjectClosure* b, OopClosure* f) NOT_JVMTI_RETURN; |
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391 |
static void gc_epilogue() NOT_JVMTI_RETURN; |
1 | 392 |
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static void transition_pending_onload_raw_monitors() NOT_JVMTI_RETURN; |
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394 |
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#if INCLUDE_SERVICES |
1 | 396 |
// attach support |
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static jint load_agent_library(const char *agent, const char *absParam, const char *options, outputStream* out) NOT_JVMTI_RETURN_(JNI_ERR); |
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#endif |
1 | 399 |
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// SetNativeMethodPrefix support |
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static char** get_all_native_method_prefixes(int* count_ptr) NOT_JVMTI_RETURN_(NULL); |
1 | 402 |
}; |
403 |
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404 |
// Support class used by JvmtiDynamicCodeEventCollector and others. It |
|
405 |
// describes a single code blob by name and address range. |
|
13195 | 406 |
class JvmtiCodeBlobDesc : public CHeapObj<mtInternal> { |
1 | 407 |
private: |
408 |
char _name[64]; |
|
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address _code_begin; |
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address _code_end; |
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411 |
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412 |
public: |
|
413 |
JvmtiCodeBlobDesc(const char *name, address code_begin, address code_end) { |
|
414 |
assert(name != NULL, "all code blobs must be named"); |
|
415 |
strncpy(_name, name, sizeof(_name)); |
|
416 |
_name[sizeof(_name)-1] = '\0'; |
|
417 |
_code_begin = code_begin; |
|
418 |
_code_end = code_end; |
|
419 |
} |
|
420 |
char* name() { return _name; } |
|
421 |
address code_begin() { return _code_begin; } |
|
422 |
address code_end() { return _code_end; } |
|
423 |
}; |
|
424 |
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425 |
// JvmtiEventCollector is a helper class to setup thread for |
|
426 |
// event collection. |
|
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class JvmtiEventCollector : public StackObj { |
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private: |
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JvmtiEventCollector* _prev; // Save previous one to support nested event collector. |
|
430 |
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public: |
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void setup_jvmti_thread_state(); // Set this collector in current thread. |
|
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void unset_jvmti_thread_state(); // Reset previous collector in current thread. |
|
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virtual bool is_dynamic_code_event() { return false; } |
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435 |
virtual bool is_vm_object_alloc_event(){ return false; } |
|
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JvmtiEventCollector *get_prev() { return _prev; } |
|
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}; |
|
438 |
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// A JvmtiDynamicCodeEventCollector is a helper class for the JvmtiExport |
|
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// interface. It collects "dynamic code generated" events that are posted |
|
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// while holding locks. When the event collector goes out of scope the |
|
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// events will be posted. |
|
443 |
// |
|
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// Usage :- |
|
445 |
// |
|
446 |
// { |
|
447 |
// JvmtiDynamicCodeEventCollector event_collector; |
|
448 |
// : |
|
449 |
// { MutexLocker ml(...) |
|
450 |
// : |
|
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// JvmtiExport::post_dynamic_code_generated_while_holding_locks(...) |
|
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// } |
|
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// // event collector goes out of scope => post events to profiler. |
|
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// } |
|
455 |
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456 |
class JvmtiDynamicCodeEventCollector : public JvmtiEventCollector { |
|
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private: |
|
458 |
GrowableArray<JvmtiCodeBlobDesc*>* _code_blobs; // collected code blob events |
|
459 |
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460 |
friend class JvmtiExport; |
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void register_stub(const char* name, address start, address end); |
|
462 |
||
463 |
public: |
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JvmtiDynamicCodeEventCollector() NOT_JVMTI_RETURN; |
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~JvmtiDynamicCodeEventCollector() NOT_JVMTI_RETURN; |
1 | 466 |
bool is_dynamic_code_event() { return true; } |
467 |
||
468 |
}; |
|
469 |
||
470 |
// Used to record vm internally allocated object oops and post |
|
471 |
// vm object alloc event for objects visible to java world. |
|
472 |
// Constructor enables JvmtiThreadState flag and all vm allocated |
|
473 |
// objects are recorded in a growable array. When destructor is |
|
474 |
// called the vm object alloc event is posted for each objects |
|
475 |
// visible to java world. |
|
476 |
// See jvm.cpp file for its usage. |
|
477 |
// |
|
478 |
class JvmtiVMObjectAllocEventCollector : public JvmtiEventCollector { |
|
479 |
private: |
|
480 |
GrowableArray<oop>* _allocated; // field to record vm internally allocated object oop. |
|
481 |
bool _enable; // This flag is enabled in constructor and disabled |
|
482 |
// in destructor before posting event. To avoid |
|
483 |
// collection of objects allocated while running java code inside |
|
484 |
// agent post_vm_object_alloc() event handler. |
|
485 |
||
486 |
//GC support |
|
487 |
void oops_do(OopClosure* f); |
|
488 |
||
489 |
friend class JvmtiExport; |
|
490 |
// Record vm allocated object oop. |
|
491 |
inline void record_allocation(oop obj); |
|
492 |
||
493 |
//GC support |
|
494 |
static void oops_do_for_all_threads(OopClosure* f); |
|
495 |
||
496 |
public: |
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JvmtiVMObjectAllocEventCollector() NOT_JVMTI_RETURN; |
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~JvmtiVMObjectAllocEventCollector() NOT_JVMTI_RETURN; |
1 | 499 |
bool is_vm_object_alloc_event() { return true; } |
500 |
||
501 |
bool is_enabled() { return _enable; } |
|
502 |
void set_enabled(bool on) { _enable = on; } |
|
503 |
}; |
|
504 |
||
505 |
||
506 |
||
507 |
// Marker class to disable the posting of VMObjectAlloc events |
|
508 |
// within its scope. |
|
509 |
// |
|
510 |
// Usage :- |
|
511 |
// |
|
512 |
// { |
|
513 |
// NoJvmtiVMObjectAllocMark njm; |
|
514 |
// : |
|
515 |
// // VMObjAlloc event will not be posted |
|
516 |
// JvmtiExport::vm_object_alloc_event_collector(obj); |
|
517 |
// : |
|
518 |
// } |
|
519 |
||
520 |
class NoJvmtiVMObjectAllocMark : public StackObj { |
|
521 |
private: |
|
522 |
// enclosing collector if enabled, NULL otherwise |
|
523 |
JvmtiVMObjectAllocEventCollector *_collector; |
|
524 |
||
525 |
bool was_enabled() { return _collector != NULL; } |
|
526 |
||
527 |
public: |
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NoJvmtiVMObjectAllocMark() NOT_JVMTI_RETURN; |
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~NoJvmtiVMObjectAllocMark() NOT_JVMTI_RETURN; |
1 | 530 |
}; |
531 |
||
532 |
||
533 |
// Base class for reporting GC events to JVMTI. |
|
534 |
class JvmtiGCMarker : public StackObj { |
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public: |
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JvmtiGCMarker() NOT_JVMTI_RETURN; |
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~JvmtiGCMarker() NOT_JVMTI_RETURN; |
1 | 538 |
}; |
539 |
||
540 |
// JvmtiHideSingleStepping is a helper class for hiding |
|
541 |
// internal single step events. |
|
542 |
class JvmtiHideSingleStepping : public StackObj { |
|
543 |
private: |
|
544 |
bool _single_step_hidden; |
|
545 |
JavaThread * _thread; |
|
546 |
||
547 |
public: |
|
548 |
JvmtiHideSingleStepping(JavaThread * thread) { |
|
549 |
assert(thread != NULL, "sanity check"); |
|
550 |
||
551 |
_single_step_hidden = false; |
|
552 |
_thread = thread; |
|
553 |
if (JvmtiExport::should_post_single_step()) { |
|
554 |
_single_step_hidden = JvmtiExport::hide_single_stepping(_thread); |
|
555 |
} |
|
556 |
} |
|
557 |
||
558 |
~JvmtiHideSingleStepping() { |
|
559 |
if (_single_step_hidden) { |
|
560 |
JvmtiExport::expose_single_stepping(_thread); |
|
561 |
} |
|
562 |
} |
|
563 |
}; |
|
564 |
||
7397 | 565 |
#endif // SHARE_VM_PRIMS_JVMTIEXPORT_HPP |